Engine Controls - Sensor Operating Range Charts: Introduction

Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a trouble code, but it may cause driveability problems.

NOTE: Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.

CAMSHAFT POSITION SENSOR (1.6L)

Terminal No. ⁽¹⁾

Volts

Pulses Per Revolution

⁽¹⁾	Measured at PCM connector C249, with distributor removed from engine, fuel injection connector at distributor disconnected, distributor 6 pin connector connected, ignition on and distributor turned by hand.

CRANKSHAFT POSITION SENSOR RESISTANCE ⁽¹⁾

Terminals No.

Ohms

1 & 2

500-600

⁽¹⁾	Measured at 68°F (20°C)

EGR BOOST SENSOR (1.8L)

Vacuum Applied ⁽¹⁾

⁽²⁾ Volts At PCM

4.4 (15)

11.8 (40)

1.6

28.1 (95)

4.9

31.0 (105)

4.9

⁽¹⁾	In Hg (kPa).

⁽²⁾	Connector C254, terminal No. 15.

EGR POSITION SENSOR

Vacuum Applied ⁽¹⁾

⁽²⁾ Volts At PCM

0 (0)

0.8

5.0 (17)

4.9

⁽¹⁾	In Hg (kPa).

⁽²⁾	Connector C254, terminal No. 13.

EGR PRESSURE SENSOR (1.6L)

Vacuum Applied ⁽¹⁾

⁽²⁾ Volts At PCM

6.0 (20)

3.5

12.5 (42)

2.5

16.0 (54)

2.0

25.0 (84)

⁽¹⁾	In Hg (kPa).

⁽²⁾	Connector C254, terminal No. 15.

ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE ⁽¹⁾

Temperature - °F (°C)

Ohms

68 (20)

2200-2700

⁽¹⁾	Measure resistance between sensor terminals.

MASS AIRFLOW (MAF) SENSOR VOLTAGE (1.6L)

Condition	Terminal No.	Voltage
Ignition On	2	Less than 1.0
Idle	2	1.0-2.0
Ignition On and Idle	5	Less than 1.0

OXYGEN SENSOR HEATER RESISTANCE ⁽¹⁾

Between Terminals No.

Ohms

2 & 3

⁽¹⁾	Measured at 68°F (20°C).

OXYGEN SENSOR VOLTAGE ⁽¹⁾

Condition

Volts

Increase Engine Speed

.5-1.0

Decrease Engine Speed

0-.4

⁽¹⁾	Measure voltage between ground and PCM connector C254 terminal No. 2 (front sensor) or No. 10 (rear sensor) with engine running and at normal operating temperature.

TP SENSOR CONTINUITY SPECIFICATIONS (1.6L CLOSED TP SWITCH)

Test Condition ⁽¹⁾

Check Between Pin Nos. ⁽²⁾

Continuity?

.004" (.1 mm)

1 & 2

Yes

⁽¹⁾	Insert feeler gauge of specified thickness between throttle lever and throttle stop screw.

⁽²⁾	For information on connector terminal identification and test conditions, see ADJUSTMENTS article.

TP SENSOR VOLTAGE SPECIFICATIONS ⁽¹⁾

Condition

Volts

Throttle Fully Closed

.1-1.1

Throttle Fully Open

2.8-4.5

⁽¹⁾	Ensure voltage change is smooth as throttle is opened and closed.